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Installation precautions
zNID Hardware Installation Guide
41
Wall mount without fiber tray
Caution:
To prevent damage to the enclosure, use screws
appropriate to the mounting surface.
Précaution
: Afin d'éviter d'endommager l'enceinte, utilisez des vis
adaptées à la surface de montage.
Caution:
Install the zNID fiber tray a proper height from the floor.
Précaution
: Installez le plateau de fibres zNID à une hauteur
correcte par rapport au sol.
Caution:
The zNID should always be mounted in a vertical
orientation.
Précaution
: Le zNID doit toujours être monté en orientation
verticale.
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zNID 24xx Installation
42
zNID Hardware Installation Guide
Mounting the zNID on a wall without the fiber tray
Figure 11:
Installing the fiber tray on a wall
To mount the zNID directly on a wall:
1
Prepare the surface for mounting.
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Installation precautions
zNID Hardware Installation Guide
43
2
Mark the hole positions.
The holes for the fiber tray are 13 cm apart (about 5.12 inches or a little
less than 5 and 1/8 inches) on the horizontal axis.
3
Drill the holes.
4
Attach the screws.
Use screws appropriate for the type of surface to which the unit is
mounted (i.e. wood, brick, CB, etc.).
5
Put the zNID on the screws.
The screws should be leave enough space from being flush with the wall
for the zNID legs to hold the unit firmly against the wall.
Desktop with fiber tray
To mount the zNID fiber tray on a wall:
1
Prepare the surface for mounting.
2
Wind the fiber in the tray.
See
Optical fiber cable placement in the zNID fiber tray
on page 45
3
Put the zNID on the fiber tray.
The wall mount sockets on the zNID fit the two nubs which stick out from
the fiber spool on the fiber tray.
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zNID 24xx Installation
44
zNID Hardware Installation Guide
Manage the optical cable
When making a fiber optic connection, avoid touching the fiber cable ends to
the outside of the mating connector. Touching can contaminate the
connectors.
Fiber handling
Before making any connections, be sure that the optical cable fiber tips and
components are clean and free of dust and debris.
The zNID fiber tray provides fiber spools and hooks to avoid sharp bends in
the fiber cable. A minimum bend radius of 30 mm is recommended for
stripped fiber and larger fiber needs a larger bend radius to guarantee the
specified system performance.
Note:
Sharp bends in fiber cables create undesirable optical
attenuation or loss.
Testing optical power
Table 5
specifies how much laser power to expect on the fiber.
Table 5:
Optical values for the triplexer for zNID-GPON-24xx
Parameter
1490 nm
(Data Downstream)
1550 nm
(RF Downstream)
Damage Level
+5 dBm
+5 dBm
Optical Overload
-8 dBm
+2 dBm
Minimal Optical Signal
-28 dBm
-8 dBm
Mid Range Optical Value
-17 dBm
-4 dBm
Table 6:
Optical values for the triplexer for zNID-GE-24xx
Parameter
Active Ethernet
Damage Level
+5 dBm
Optical Overload
-2 dBm
Minimal Optical Signal
-23 dBm
Mid Range Optical Value
-12 dBm
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Installation precautions
zNID Hardware Installation Guide
45
Optical fiber cable placement in the zNID fiber tray
Using a fiber tray involves routing the optical fiber around the spools, then
physically to the SC connector in the zNID.
Note:
Sharp bends in fiber cables create undesirable optical
attenuation or loss. The zNID enclosure provides fiber spools and
hooks to avoid sharp bends in the fiber cable. A minimum bend radius
of 30 mm (1.2 in) is recommended for stripped fiber.
To place the fiber cable in the fiber tray:
1
Inspect and clean the fiber connector to ensure it is free of impurities.
2
Make sure the fiber segment is properly installed in the fiber tray, excess
cable is wrapped around fiber reels without having improper bends
leaving enough loose cable so that it will not take too sharp of a bend to
connect to the zNID.
Figure 12:
Maintain the proper bend radius in the fiber
3
Test the fiber cable to verify clean signals.
Note:
It is recommended that the fiber cable be tested before
finishing.
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